Brand : Sonic
Sonic Metal Air Caulking Gun for Sealing Gaps and Cracks, 310 ml Capacity (ST-6640) - 3 Months Warranty
SKU : TI-SM-47510
MRP : ₹3899
₹2999
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Delivery By: Nov 8 - Nov 10
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Short Description
Sonic Metal Air Caulking Gun 
For Sealing Gaps and Cracks
Compatible for 310ml Silicone Sealants
Country of origin: Taiwan, Province of China
Specification
  • Brand: Sonic
  • Weight (Approx.) : 1.1 kg
  • Model No. : ST-6640
  • Capacity : 310 ml
  • Bore x Tube Length : 2" x 8-1/2" (51 mm x 216 mm)
  • Air Inlet : 1/4" (6mm)
  • Air Hose : 3/8" (10mm)
  • Operated Air pressure : 45-90 Psi
  • Overall Length : 12" (305mm)

Note : 3 Months Warranty


Description

The Sonic Metal Air Caulking Gun (ST-6640) is a robust pneumatic dispensing tool constructed with a full metal body to deliver professional-grade caulking performance. Ideal for use with standard 310 ml cartridges of silicone or other sealants, this gun offers continuous, consistent flow and precise control - perfect for sealing gaps, joints and cracks in construction, glazing, automotive, marine and general industrial applications. Its ergonomic pistol-grip design reduces operator fatigue, while the 1/4″ air inlet and reliable internal mechanism ensure stability and durability under rigorous use. Backed by a 3-month warranty, it is built to serve contractors and tradespeople who require effective, high-throughput sealing performance.

Features

 :
  • Durable metal construction : The body of the tool is built primarily of metal, offering long service life and resistance to wear.
  • Cartridge compatibility : Designed for use with standard 310 ml cartridges of silicone or similar sealants.
  • Optimised bore & tube length :  Specification lists show a 2" × 8½" bore/tube length and overall length of 12".
  • Air-powered operation :  This pneumatic caulking gun leverages air pressure for smooth, controlled dispensing rather than purely manual force.
  • Precise flow control :  Because it’s air-driven, the user can fine-tune the flow rate of sealant, reducing waste and improving finish quality.
  • Ergonomic pistol-grip design :  The handle style reduces operator fatigue during extended use.
  • Versatile use across materials :  Suitable for sealing on substrates such as glass, metal, concrete, wood, plastic and rubber when used with appropriate sealants.
  • Industrial-grade performance : Suitable for demanding jobs (e.g., curtain wall sealing, vehicle assembly, marine sealing).
  • Quick set up & easy cartridge loading :  Designed for fast tip-cutting, nozzle fitting and cartridge insertion so you can get to work quickly.
  • Warranty protection :  Comes with a 3-month warranty (as stated in your description) to cover manufacturing faults or performance issues.

Applications

 :
  • Sealing gaps and cracks around window and door frames
  • Applying silicone joint sealant in kitchens, bathrooms and wet areas
  • Filling expansion joints in concrete, masonry and precast panels
  • Automotive bodywork sealing and adhesive application
  • Marine sealing tasks (hulls, fuel tanks, underwater components) when paired with suitable marine-grade sealant
  • Curtain wall and façade construction - applying sealants between glass, metal mullions and structural elements
  • General industrial assembly where adhesives or sealants are used in cartridge form
  • DIY and renovation jobs: bath-tubs, sinks, tiled surfaces, roofing leaks

Usage

 :
  • Ensure your air supply meets the required specification (typically 45–90 psi for similar models) and use a clean, dry, regulated line.
  • Cut the tip off your sealant cartridge and attach the correct size nozzle for the bead width you require.
  • Insert the 310 ml cartridge into the gun’s barrel. Secure the retaining collar or cover ring as required. 
  • Connect the air hose to the 1/4″ inlet and ensure the gun is stable.
  • Pull the trigger to dispense sealant, adjusting your bead speed and width by regulating air flow or nozzle diameter.
  • Maintain a steady hand and consistent speed to achieve a uniform bead without gaps or voids.
  • After use, clean the tool: relieve air pressure, remove the empty cartridge, wipe off any excess sealant from the nozzle and gun body, and store the gun in a dry, protected place.
  • If the tool will be idle for several days, many manufacturers recommend a few drops of pneumatic tool oil in the inlet prior to next use.
  • Observe the warranty terms : the 3-month warranty typically covers manufacturing defects but not wear and tear, misuse or damage from foreign materials - record the purchase date and keep the warranty card.

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